Marvair MAR7000, Лист данных продукта

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MAR7000 5 1/2013, P/N 01757 Rev. B
MS/TP Network End-Of-Line Termination
(3 Input Models)
Network Wiring
For MS/TP communications, connect the EIA-485
wiring to –A and +B terminals on the backplate.
Connect the –A terminals in parallel with all other
–A terminals on the network and the +B terminals
in parallel with all other +B terminals. (See MS/TP
Network End-Of-Line Termination on page 5 and
Terminals and Connections on page 6 .) Connect
the shields of the cable (Belden cable #82760 or
equivalent) together at each device with a wire
nut or equivalent.
For
Ethernet or IP communications, plug an
Ethernet cable directly into the RJ-45 jack on the
back of the MAR7000.
MS/TP EOL (End-Of-Line) Termination
The controllers/thermostats on the physical ends
of the EIA-485 wiring segment must have end-
of-line termination installed for proper network
operation. (See MS/TP Network End-Of-Line
Termination and EOL and Pull-Up Switch
Resistor Positions on page 5 .) If an MAR7000 is at
the physical end of the MS/TP network line, set
both the EOL termination switches to On (to the
right/up ) on the back of the circuit board. If not
on the end, ensure that both switches are Off (left/
down).
10K
Ω
0-12 V
Input Pull-Up Switches
EOL
Switches
ON OFF
Pushed Left
Pushed Right
IN2
IN3
IN4
IN7
IN8
IN9
1
2
3
4
5
6
3
4 3
4
IN4 =
5
6
10K
Ω
0-12 V
5
6
IN3 =
7
8 7
8
IN2 =
7
8
EOL =
Pushed Left Pushed Right
1
2
ON OFF
1
2
10K
Ω
0-12 V
10K
Ω
0-12 V
EOL: On On Off Off Off
MS/TP Network
EOL and Pull-Up Switch Resistor Positions
(6 Input Models)
10K Ohm
0-12 VDC
Input Pull-Up Switches
EOL
Switches
ON
OFF
Switch Pushed Up
Pushed Down
IN2 IN3 IN4 IN7 IN8 IN9
(CO
2
Models)
Input Connections
Passive input devices require pull-up resistors in
the circuit. For passive input devices (e.g., switch
contacts and Type III 10K ohm thermistors) on
the external inputs, set the pull-up switches on
the back of the circuit board to the 10K position.
For active voltage devices, set the switches to the
0–12 VDC position. (See EOL and Pull-Up Switch
Resistor Positions on page 5 and Terminals and
Connections on page 6 .)
NOTE: Unlike the EOL switch pairs, the
INPUT switch pairs must NOT have
both switches set in the same direction .
ALL the input pull-up resistor switch
pairs must be fully latched in either
10K Ohm or 0–12 VDC position even if
a switch pair has no input connected!
A single incorrect switch position may
cause errors in multiple inputs.
NOTE: Inputs do not support 1K ohm RTDs.
NOTE: IN1 is the room temperature sensor AI1.